﻿<!DOCTYPE html>
<html>
<head>
  <title>Serpentine Layout</title>
  <!-- Copyright 1998-2021 by Northwoods Software Corporation. -->
  <meta name="description" content="TypeScript: Arrange a chain of nodes in rows, alternating directions, back and forth." />
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
</head>
<body>
  <div id="sample">
    <div id="myDiagramDiv" style="border: solid 1px black; width:100%; height:500px; min-width: 200px"></div>
    <p>
      This sample demonstrates a custom Layout, SerpentineLayout, which assumes the graph consists of a chain of nodes.
      The layout is defined in its own file, as <a href="SerpentineLayout.ts">SerpentineLayout.ts</a>.
    </p>
    <p>
      It also has <a>Layout.isViewportSized</a> set to true, so that resizing the Diagram DIV will automatically re-layout.
    </p>
  </div>

  <script type="module" id="code">
    import * as go from "../release/go-module.js";
    import { SerpentineLayout } from './SerpentineLayout.js';

    if (window.goSamples) goSamples(); // init for the samples -- you don't need to call this
    const $ = go.GraphObject.make;

    const myDiagram = $(go.Diagram, 'myDiagramDiv', // create a Diagram for the DIV HTML element
      {
        isTreePathToChildren: false,
        layout: $(SerpentineLayout) // defined in SerpentineLayout.js
      });
    myDiagram.nodeTemplate =
      $(go.Node, go.Panel.Auto,
        $(go.Shape, { figure: 'RoundedRectangle', fill: 'white' },
          new go.Binding('fill', 'color')),
        $(go.TextBlock, { margin: 4 },
          new go.Binding('text', 'key')));

    myDiagram.linkTemplate =
      $(go.Link, go.Link.Orthogonal,
        { corner: 5 },
        $(go.Shape),
        $(go.Shape, { toArrow: 'Standard' }));

    myDiagram.model = $(go.TreeModel, {
      nodeParentKeyProperty: 'next',
      nodeDataArray: [
        { key: 'Alpha', next: 'Beta', color: 'coral' },
        { key: 'Beta', next: 'Gamma', color: 'tomato' },
        { key: 'Gamma', next: 'Delta', color: 'goldenrod' },
        { key: 'Delta', next: 'Epsilon', color: 'orange' },
        { key: 'Epsilon', next: 'Zeta', color: 'coral' },
        { key: 'Zeta', next: 'Eta', color: 'tomato' },
        { key: 'Eta', next: 'Theta', color: 'goldenrod' },
        { key: 'Theta', next: 'Iota', color: 'orange' },
        { key: 'Iota', next: 'Kappa', color: 'coral' },
        { key: 'Kappa', next: 'Lambda', color: 'tomato' },
        { key: 'Lambda', next: 'Mu', color: 'goldenrod' },
        { key: 'Mu', next: 'Nu', color: 'orange' },
        { key: 'Nu', next: 'Xi', color: 'coral' },
        { key: 'Xi', next: 'Omicron', color: 'tomato' },
        { key: 'Omicron', next: 'Pi', color: 'goldenrod' },
        { key: 'Pi', next: 'Rho', color: 'orange' },
        { key: 'Rho', next: 'Sigma', color: 'coral' },
        { key: 'Sigma', next: 'Tau', color: 'tomato' },
        { key: 'Tau', next: 'Upsilon', color: 'goldenrod' },
        { key: 'Upsilon', next: 'Phi', color: 'orange' },
        { key: 'Phi', next: 'Chi', color: 'coral' },
        { key: 'Chi', next: 'Psi', color: 'tomato' },
        { key: 'Psi', next: 'Omega', color: 'goldenrod' },
        { key: 'Omega', color: 'orange' }
      ]
    });

    window.myDiagram = myDiagram; // Attach to the window for console debugging
  </script>
</body>
</html>